에너지원 큐브를 이용한 적의 등장으로 인류가 위험에 처하자 국제평화유지기구인 쉴드의 국장 닉 퓨리는 어벤져스 작전을 위해 전 세계에 흩어져 있던 슈퍼히어로들을 찾아나선다. 아이언맨부터 토르, 헐크, 캡틴 아메리카는 물론, 쉴드의 요원인 블랙 위도우, 호크 아이까지, 최고의 슈퍼히어로들이 어벤져스의 멤버로 모이게 되지만, 각기 개성이 강한 이들의 만남은 예상치 못한 방향으로 흘러가는데...
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Robert Downey Jr.
Tony Stark / Iron Man
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Chris Evans
Steve Rogers / Captain America
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Mark Ruffalo
Bruce Banner / The Hulk
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Chris Hemsworth
Thor Odinson
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Scarlett Johansson
Natasha Romanoff / Black Widow
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Jeremy Renner
Clint Barton / Hawkeye
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Tom Hiddleston
Loki
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Samuel L. Jackson
Nick Fury
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Cobie Smulders
Maria Hill
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Clark Gregg
Phil Coulson
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Stellan Skarsgård
Erik Selvig
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Gwyneth Paltrow
Virginia "Pepper" Potts
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Paul Bettany
J.A.R.V.I.S. (voice)
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Alexis Denisof
The Other
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Tina Benko
NASA Scientist
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Jerzy Skolimowski
Georgi Luchkov
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Kirill Nikiforov
Weaselly Thug
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Jeff Wolfe
Tall Thug
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M'laah Kaur Singh
Young Girl
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Rashmi Rustagi
Calcutta Woman
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Donald Li
World Security Council
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Jesse Garcia
Carrier Bridge Techs
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Maximiliano Hernández
Jasper Sitwell
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Dieter Riesle
Gala Scientist
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Kenneth Tigar
German Old Man
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Walter Perez
Shield Pilot
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Harry Dean Stanton
Security Guard
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Josh Cowdery
Maintenance Guy
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Ashley Johnson
Waitress
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Katsumi Komatsu
Japanese Family
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Robert Clohessy
Police Sergeant
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Enver Gjokaj
Police Officer
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Robin Swoboda
News Reporter
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Brent McGee
Faceless Pilot
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Kelley Robins Hicks
Celebration Montage Interviewee
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Romy Rosemont
Shawna Lynde
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James Eckhouse
Senator Boynton
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Pat Kiernan
Himself
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Damion Poitier
Thanos (uncredited)
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Lou Ferrigno
Hulk (voice - uncredited)
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Jillian Morgese
Woman in Restaurant (uncredited)
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Catherine Anderson
German Pedestrian (uncredited)
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Ricardo Andres
Lentil Merchant (uncredited)
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Hank Amos
S.H.I.E.L.D. Agent (uncredited)
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Mayank Bhatter
Celebration Montage Man Shaving Beard (uncredited)
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Layla Cushman
Gala Guest (uncredited)
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Jason Botsford
Museum Gala Patron (uncredited)
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Gene N. Chavez
S.H.I.E.L.D. Guard (uncredited)
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Robert Dean
Soldier (uncredited)
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Rick Dremann
Museum Gala Guest (uncredited)
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Rod Fielder
Pedestrian (uncredited)
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Alexander Christopher Jones
Mercenary (uncredited)
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Tiffany Sander McKenzie
Civilian (uncredited)
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Chris Vaina
Running Pedestrian (uncredited)
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Sandra Weston
Sweeper (uncredited)
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Seth Zielicke
Barbershop (uncredited)
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Alex DeCourville
Tourist (uncredited)
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Andrea-Nichole Olivas
S.H.I.E.L.D agent (uncredited)
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Tina Grimm
NYC Pedestrian (uncredited)
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Evan Kole
Principal (uncredited)
